Textile operation



May w, 1936. H. DREYFUS 2,040,925

TEXT ILE OPERAT ION Filed March 25, 1932 INVE/VTUk h NE) iffy/ 05 Patented May 19, 1936 UNITED STATES PATENT .QFFICE Application March 25, 1932, Serial No. 601,293 In Great Britain June 9, 1231 6 Claims. (Cl. 1397- 126.)

This invention relates to textile operations and is especially concerned with the weaving of fabrics, particularly by means of shuttleless looms wherein a weft threadis. drawn into a loop of 5 the requisite length outside the warp shed, and is then carried through and inserted in the shed in the course of weaving.

Inlooms of the type referred to, e. g. in the 10. 1 6 described in U. S. Patents Nos. 2,012,121

10 filed 27th September, 1930, and 1,883,354 filed th October, 1930, the Weft isdrawn into a measured loop of sufiicient length either for One or for two picks. One end of the loop is then ele sed nd t e w ft is, en a ed y .weft n- 15 serting means which carry the free end through .the shed. A pick may be inserted from the other side of the, loom, and then, if. a loop sufficient for two picks has been drawn, the other end .of h 1001 s released a d s a ie n to he shed by the'inserting means to form asecond pick. .I an we. h weft i sertin means e ag net as e ip he en f ewe oop. but to P k u a in erm diate ortion o one of it lim s, o th th r en s flo t throu h the 5 sh I as n b en found ha i two such loops are formed simultaneously, the two weft threa can be h ie te eth f int hese shed without twisting or entanglement between the two free ends, so that the two picks are laid .3 quite ,e reie and ral el in theks me s d- According to the pres'ent invention a, fabric is woven in a shuttleless loom wherein the weft is formed into measured loops and is then carried through the shed with the aid of inserting means,

by causing the inserting means to carry two or more of such weft threads simultaneously through the shed. The weft threads are laid in the shed, and when the shed is closed, and beat-up has occurred, the two or more weft threads remain parallel in the fabric. While the invention is applicable to the insertion of two, three, or more picks pf .weft simultaneously in asingle shed, reference will be made hereafter to the insertion of two suchpicks', it being understood that a greater number may be similarly inserted-if desired.

'The two weft loops which are to be inserted simultaneously may be formed simultaneously as p l ps, and may e be drawn n 10 1 on a single weft loop forming apparatus. The threads may then be carriedinto the shed as if they "w re a s ng e loo b mean -ht e -Si g nse ti -m ns Thethree ei ie h era le into loops, and remainingufider tensionitljroughout the operation of loop forming, and, picking will be laid parallel in the shed.

For the purposes of the invention, a loom may be used of the'type described in U. S. Patent No,

2,012,121, in which the weft inserting n eanstalie ,5

the form of a dummy shuttle, i. e. a shuttle shaped member having herhs me n d th eqh edeht to engage e t lo a the sid o h 1 .9. The mm sh m h adapted 0 eh a the preformed weft loops by means of afsin'gle 1,0. projecting horn, and to earry them through the hed the tension m arted to. the We t du in picking being utilized to cause the weft threads to be laid straight in the shed and parallel to each other. is

The weft thread is taken from one or more stationary packages at either or both sides of the loom. The two loops may be taken from arate packages or from the same package and may consist of the same kind of thread or of different 29 kinds of thread as desired. Whether the threads are taken from" the same package or from different packages they may be formed into a double loop in one weft loop forming apparatus, to be picked together bythe dummy shuttle. Where 2?; two threads are wound on one package, they should, of course, be wound parallel to each other thereon and unwound from the package in such 'a way that they do not become doubled tiig'eth'er.

.the insertion of apiokfrq the other side .of the loom.

It will Joe seen-that by laying two picks of weft simultaneo sly t e sh d th f line i l. b

produced at a faster rate than if one pick were 5 laid. At h s me time he t ckness o t .ia ie ne 'ihe eese .e weule b th tw .W f th.

.91 were .ti lele t t er and a d a 3 .931? e 9i d uhlew eh w i e ,h s meweieh we t htea aybe i in (3'11 5 c the eft thread ie-s re de W a ch at n h of he fabr c wi h the. t eth t a reat r n th effiher iah ei ac i d- The we t a s. the be eierm epee erthe metffiiier desired characteristic or characteristics. Thus,

they may be of different colours, having been dyed before weaving, or they may be of' different materials so that, after weaving, the fabric may be dyed to give a cross-dyed, or multicolour effect. For example, artificial yarns of cellulose acetate may be used in conjunction with yarns of natural fibres such as silk, wool, or cotton, or with artificial yarns of viscose or cuprammonium silk; Again, the weft yarns may be twisted in different manners or to a different degree in order to produce fabrics having pebbled, cockled, or crepe effects. Further, yarns of different counts or deniers may be used, to give rise to a fancy appearance in the fabric. It is not necessary that every pick should be a double pick as' described above. For example, double picks may be laid in the passage of the shuttle, from one side of the shed to the other, while in its return a single'pi'ck only is laid. to produce an eifect'similar to that obtained" with yarns of. different deniers or counts. In this manner, and particularly in cooperation with patterning mechanism such as jacquard or dobby mechanism, the' present invention enables the scope of this method of weaving. to be considerably enhanced. The invention will now be described in greater detail with reference to a shuttleless loom having weft preparing and inserting apparatus of the type described in detail in U. S. Patent No. 2,012,121, filed September 27, 1930, suflicient of the apparatus being shown to, illustrate the present invention. a a

" 'In the accompanying drawing the figure illustrates; diagrammatically the application of the present invention.

Weft threads l0, packages-l2, 12 and l3, l3 proceed to trapping devices [4 IS mounted on rotatable platforms l6, disposed at each side of the warp threads I1. Each platform I 6 moves so as to cause the threads to passbetween the trapping devices I4, [5 so. that the threads extend across the face of the platform 16. One trapping device grips the extremities of the threads firmly while the other trapping device remains open. H The length of the threads I0, 10 and H, H extending between the trapping devices is then engaged at an intermediate point by pegs I 8 mounted -,on a constantly moving chain or other flexible member (not shown), as described in .U. S. PatentNo. 2,012,121, and as, one trapping device is open, thus allowing the threads 'connected' to the supply to pass through it, the threads are drawn in loop form towards the fell of the fabric until each limb of the loop so drawn is of sufiicient length'to form a pick of weft across the warp threads l1. 7

i Conveniently the loop length is arranged to terminate at a point in a line with the fell of the fabric, and on reaching this position, the loopdrawing'pegs l 8 are released from the bight of the -;1oop,; which is engaged in" turn by a retaining isidefof the drawing) is then-picked across the warp threads I! to 'the position indicated in "dotted lines on the right hand side of the draw- "ing, carrying with it the two threadsycomprising the innermost limb of the loop. ;The upper ex tremitie sof these threads are released from their trapper simultaneously with the picking of the shuttle, 7 while the opposite trapper, hitherto maintained open to allow free passage for the ready forfurther engagement by the loop draw- IO and H, II from pairs of pick consisting of a plurality of separate lengths threads proceeding from the supply, closes to grip the outer limb of the loop.

On the return of the shuttle a further pick of weft comprising the innermost limb of the loop formed on the opposite side of the'warp is caught 5 and inserted within the warp threads.

After the insertion of the innermost limb 0 each loop the rotation of the platforms I6, (the direction of which rotation is shown by arrows on the drawing) brings the outer limb of the loop into the inner position ready for engagement with the shuttle 20 and draws a further length of the weft threads across the faceof the platform between the trapping devices l4, l5,

ing pegs l8, when the loop drawing cycle is repeated. a a

On engagement of the shuttle 20 with the second loop limb the retaining finger I9 is withdrawn and the extremity of the limb is severed at its trapping device,'thus being freed for insertion within the warp threads, the trapping de-' vice retaining the ends of thread connectedto the supply. The loop limbs are thus inserted in turn and lie in the fabric 22 in inter-engaging hairpin 25 form as shownin the drawing. r .7

As the drawn loops are retained by the fingers l9 at some distance from the fabric 22 the first picks inserted from the loops 'must be long enough not only to extend across the fabric but also to extend from the edge of the fabric to the fingers 19. The extra length so required isformed in. the loop-drawing operation by a peg 2| which is disposed across the path of the loop drawingpegs' l8 and I causes a subsidiary loop (shown in dotted lines on the right hand side of r the drawing) to be drawn within the main loop; The extra length thus drawn is sufficient to ex.- tend between the edge of the fabric 22 and the 1 retaining finger l9. 1 40 The separate threads comprising each pick are laid in the fabric 22 in close parallel relation and by reasonfof their being kept under tension throughout the whole of the loop drawingand inserting period, do not twist or turn about each 7 other. r What I claim and desire to secure by Letters, Patent is:- V r 1. In the method of manufacturing a woven fabric, the steps of drawing at least two separate 50 threads into a succession of loops at the side. of a shuttleless loom, maintaining. said threads in parallel untwisted and separate relationship during drawing, simultaneously inserting lengths of the plurality of threads so drawn into one shed to 55 form one pick, and similarly inserting a further pick connected to the first pick into a subsequent shed so as to form pairs of connected picks, each of thread laid in paralleluntwisted relationship.

2. In, the method of manufacturing a'woven fabric, the steps of drawing at least two separate threadsjinto a successionof loopseach sufiicient for two picks at the side of a shuttleless loom, maintaining said threads in parallel untwisted and separate relationship during drawing, simulta neously inserting into one shed'lengths of the looped threads so drawn to form' one pick, and similarly inserting into a subsequent shed the remaining lengths of the looped threads to form relationship;

3. In the method of manufacturing a woven fabric, the steps of drawing at least two separate threads into a succession of loops each suflicient for one pick at the side of a. shuttleless loom, maintaining said threads in parallel untwisted and separate relationship during drawing, simultaneously inserting the plurality of threads so drawn into one shed to form one pick, and similarly inserting a further pick of successively looped threads connected to the first pick into a subsequent shed so as to form pairs of connected picks, each pick consisting of a plurality of separate lengths of thread laid in parallel untwisted relationship.

4. In the method of manufacturing a woven fabric, the steps of drawing at least two separate threads into a succession of loops at each side of a shuttleless loom, maintaining said threads in parallel untwisted and separate relationship during drawing, inserting from each side of the loom in turn lengths of the looped threads so drawn simultaneously into one shed to form one pick and similarly inserting further picks connected to the first picks into subsequent sheds so as to form pairs of connected picks, each pick consisting of a plurality of separate lengths of thread laid in parallel untwisted relationship.

5. In the method of manufacturing a woven fabric, the steps of drawing at least two separate threads into a succession of single loops at the side of a shuttleless loom, maintaining said threads in parallel untwisted and separate relationship during drawing, simultaneously inserting lengths of the plurality of threads so drawn into one shed to form one pick, and similarly inserting a further pick connected to the first pick into a subsequent shed so as to form pairs of connected picks, each pick consisting of a plurality of lengths of thread laid in parallel separate untwisted relationship.

6. In the method of manufacturing a woven fabric, the steps of drawing at least two separate and difierently twisted threads into a succession of loops at the side of a shuttleless loom, maintaining said threads in parallel untwisted and separate relationship during drawing, simultaneously inserting lengths of the plurality of threads so drawn into one shed to form, one pick, and similarly inserting a further pick connected to the first pick into a subsequent shed so as to form pairs of connected picks, each pick consisting of a plurality of separate lengths of at least two differently twisted threads laid in parallel untwisted relationship. 7

HENRY DREYFUS.

CERTIFICATE OF CORRECTION.

Patent No. 2,040,925. May 19, 1956.

HENRY DREYFUS.

It is hereby Certified that error appears in the printed specification of the above numberedpatent requiring correction as follows: Page 5, second column, line 1'6, claim 5, strike out the Word "separate" and insert the same before "lengths" in line 12, same claim; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. Signed and sealed this 18th day of August, A. D. 1956. 1

Henry Van arsdaie 1 (Seal) Acting Commissioner of Patents. 

